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Fact Sheets

The CDC National Notifiable Diseases Surveillance System (NNDSS) is a nationwide collaboration that enables all levels of public health (local, state, territorial, federal, and international) to share health information to monitor, control, and prevent the occurrence and spread of state-reportable and nationally notifiable infectious and some non-infectious diseases and conditions.

NNDSS is a multifaceted program that includes the surveillance system for collection, analysis, and sharing of health data and also policies, laws, electronic messaging standards, people, partners, information systems, processes, and resources at the local, state, and national levels.

Many state, tribal, local, and territorial (STLT) health departments; CDC; and partner organizations, such as the Council of State and Territorial Epidemiologists, use facets of NNDSS to
  • collect, manage, share, analyze, interpret, and disseminate health-related data for state-reportable and nationally notifiable diseases and conditions;
  • develop and maintain national standards—such as consistent case definitions and electronic messaging standards;
  • monitor regional and national trends in diseases and health conditions;
  • work with other jurisdictions and partners to implement and assess prevention and control programs;
  • designate certain diseases and conditions as nationally notifiable;
  • submit data on nationally notifiable diseases to CDC; and
  • maintain and publish the official national notifiable diseases statistics from 57 state, territorial, and local reporting jurisdictions in the Morbidity and Mortality Weekly Report (MMWR) (weekly and annually).

Fact Sheets